12 31... Replacing alternator belt pulley (with overrunning clutch)
WARNING: This page is about a different car, the 2010 BMW 135i, 2009 BMW 135i, and 2008 BMW 135i. However, it is still accessible from the selected car via links, so may be relevant.
Special tools required:
- 12 7 120
See ENGINE ELECTRICAL SYSTEM - SPECIAL TOOLS .
Remove and install alternator drive belt.
Grip alternator shaft with:
- internal serration
Release nut with special tools 12 7 120.
Installation:
Tightening torque 12 31 3AZ, see 12 31 ALTERNATOR WITH DRIVE AND MOUNTING PARTS .